4.1.3.2.18 ShowDistributionChart

ShowDistributionChart procedure

Prototype:	function ShowDistributionChart (TableOrLayer :TObjectWrapper; const AttributeName_ :string; const NullAsZero_ :boolean; const ClassWidth_ :variant; const Xlabel_,ChartLabel_,Options_ :string);
Description:	Shows distribution chart from data
Syntax:	ShowDistributionChart (tab, AttributeName, NullAsZero, ClassWidth, Xlabel, ChartLabel, Options);
	Part	Description
	TableOrLayer	Table containing source variables
	AttributeName	Attribute of source table containing data to enter calculations
	NullAsZero	Boolean expression defining whether to exclude null (false) entries or replace nulls with zeros (true)
	ClassWidth	Width of class
	Xlabel	Name of the x-axis
	ChartLabel	Name of the chart
	Options	List of input options (see list of available input options)

Example:

Task:

Show distribution chart of DBH.

Data stored in the database.

Script:

var

tab : TTableWrapper;

attributeName, chartLabel, Xlabel, options: string;

nullAsZero: boolean;

classWidth : variant;

begin

tab:= Trees.table;

attributeName:= 'DBH_mm';

nullAsZero:= false; // dont want calculate with a null value

classWidth:= 1;

Xlabel:= 'DBH_cm';

chartLabel:= 'Distribution chart of DBH';

options:= 'X0=15; SHOWCHART=YES; SHOWEQUATION=NO; LINEWIDTH=123,123,123; X[1]=25.0; X[2]=50.0';

ShowDistributionChart(tab, attributeName, nullAsZero, classWidth, Xlabel, chartLabel, options);

end.

Output in Field-Map Data Collector: